100% True Bypass output keeps your tone intact Choose from four types of display modes: Full Strobe, Half Strobe, Meter & Mirror Compact pedal sized guitar/bass tuner that fits in your pedal board. Large bright LED meters clearly show any tuning discrepancy. A broad detection range from E0 (20.60 Hz) to C8 (4186 Hz). Calibration is adjustable from 436--445 Hz. A 9 VDC output jack is provided for cascading the power supply to other pedals. Sleek, black and tough aluminum die cast body for superb durability.